Can I use a different value?

[Herr Masel]

I am starting a big daddy, but I just noticed that the place I bought the components from gave me a 4k7 instead of 4m7 for the input resistor.! There is a holiday here now so I won't be able to get a new one till friday or even next week. Would a similar value work as well? How close does it have to be?

[MartyMart]

4X 1M in series will get you close enough, or a 3M3 + 1M  etc etc

Marty.

[Herr Masel]

Thanks.

[SaBer]

The 4M7 resistor determines the input impedance. Anything from 1M up should be ok. The higher the impedance, the more "sparkle". 1M could be considered some sort of standard value, and even lower values will work. I suggest you stick in the biggest single resistor you have, and replace it later.

[Herr Masel]

Cool, but how about this - I have two lm386n1 chips, one for the big-daddy and one for a ruby bassman. I was looking at the datasheet to see if I could use the mod for the ruby that uses 12v instead of 9, and came across: "Battery operation Minimum external parts Wide supply voltage range: 4V­ 12V or 5V­ 18v", so apparently it can do 12v but not 9? Or can it be used for values between 4 and 12 volts? Not likely because that would make the 5-18 statement redundant. The thing is ROG site recommends a lm386.